How does this affect the Offensive Security courses? Surprisingly enough, with all the new changes we have made in Kali, the user experience remains pretty much the same. Our students should feel little difference between Kali and BackTrack. As usual, with our course upgrades, all alumni will be able to upgrade their course materials for a reduced fee. Students who have enrolled in PWB since the 1st of Jan, 2013 will get an additional discount on the upgrade fee – once a new version of PWB is available, in the next 6 months. Our lab environment will not be changing due to the new BackTrack version. Be patient, we will release more information about Kali once it’s ready…soon.

Based on the above, I don't really see any reason to wait other than to save on the upgrade fee.

I am going to start it in november-december. There are two goals - to earn 40 cissp cpe and start my oscp certification process. I will prepare myself to it, studying linux, scripting and so on. So I will stay tuned. Good luck to the topic starter!